CN112781104B - Fresh air assembly, air conditioning system and control method of air conditioning system - Google Patents
Fresh air assembly, air conditioning system and control method of air conditioning system Download PDFInfo
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- CN112781104B CN112781104B CN202011548168.8A CN202011548168A CN112781104B CN 112781104 B CN112781104 B CN 112781104B CN 202011548168 A CN202011548168 A CN 202011548168A CN 112781104 B CN112781104 B CN 112781104B
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- air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
- F24F1/0328—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air
- F24F1/035—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air characterised by the mounting or arrangement of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
- F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application provides a fresh air component, an air conditioning system and a control method of the fresh air component and the air conditioning system. The fresh air component comprises a pipeline, an indoor unit and an outdoor unit which are connected with an air conditioning system and used for circulating a refrigerant; the pipeline is provided with a first branch pipe and a second branch pipe, the first branch pipe is communicated to the outside, and the second branch pipe is communicated to the inside. The refrigerant gas pipeline of the air conditioning system is used as a fresh air pipeline, so that the problem that pipe holes are additionally formed in a wall body of a fresh air conditioner is solved.
Description
Technical Field
The application belongs to the technical field of air conditioning systems, and particularly relates to a fresh air component, an air conditioning system and a control method of the fresh air component.
Background
With the improvement of air conditioning technology, people pay more attention to the indoor air quality. Fresh air conditioner can improve indoor air quality, and the new trend system mainly comprises new fan, the indoor outer new tuber pipe of connection, and the power through new fan is with outdoor fresh air leading-in indoor, and current new tuber pipe is for guaranteeing sufficient new amount of wind, and the pipe diameter is designed great usually, and after sale installation needs reach the great through-hole of beating at the wall body, consequently brings the building transformation, the installation work volume is big, and to the big scheduling problem of destruction to the wall body outward appearance.
Disclosure of Invention
Therefore, the technical problem to be solved by the application is to provide a fresh air assembly, an air conditioning system and a control method of the fresh air assembly, and the fresh air assembly can avoid the newly added fresh air pipe hole on the wall.
In order to solve the above problem, the present application provides a new trend subassembly, includes:
a pipe connecting an indoor unit and an outdoor unit of the air conditioning system, for circulating a refrigerant;
the pipeline is provided with a first branch pipe and a second branch pipe, the first branch pipe is communicated to the outside, and the second branch pipe is communicated to the inside.
Optionally, the indoor unit includes an evaporator, the outdoor unit includes a compressor, and the duct includes a duct section connected between an outlet of the evaporator and an inlet of the compressor.
Optionally, a first control valve is arranged on the first branch pipe, a second control valve is arranged between the pipe section and the compressor inlet, a third control valve is arranged on the second branch pipe, and a fourth control valve is arranged between the pipe section and the evaporator outlet.
Optionally, the fresh air module further comprises a reversing module, and the reversing module is arranged on the first branch pipe and used for changing the airflow direction in the first branch pipe.
Optionally, the reversing assembly comprises an air pump and a four-way valve, and the four-way valve comprises a four-way valve.
Optionally, a filter assembly is further disposed at the other end of the first branch pipe, and the filter assembly is set to be in one-way communication with the pipe section in the flow direction.
According to another aspect of the present application, there is provided an air conditioning system comprising a fresh air component as described above.
Optionally, the outdoor unit further comprises a throttling device, and a fifth control valve is arranged between the throttling device and the inlet of the evaporator.
According to another aspect of the present application, there is provided a control method of the air conditioning system, the control method includes a fresh air mode, the fresh air mode includes a refrigerator recovery stage and a fresh air introduction stage;
the refrigerant recovery stage comprises: closing the first control valve, the third control valve and the fifth control valve, opening the second control valve and the fourth control valve, operating the compressor for a preset time, and closing the second control valve and the fourth control valve;
the fresh air introduction stage comprises: and opening the first control valve and the third control valve, and supplying air to the room by the fresh air through the first branch pipe, the pipe section and the second branch pipe.
Optionally, the control method further comprises an air conditioning mode, wherein the air conditioning mode comprises a vacuumizing stage and an operating stage;
the evacuation phase comprises: opening the first control valve, closing the second control valve, the third control valve, the fourth control valve and the fifth control valve, exhausting the air to a preset vacuum degree from the first branch pipe to the outdoor by the regulating and controlling reversing assembly, and closing the first control valve;
the operating phase comprises: and opening the second control valve, the fourth control valve and the fifth control valve, and operating the compressor.
The application provides a new trend subassembly includes: a pipe connecting an indoor unit and an outdoor unit of the air conditioning system, for circulating a refrigerant; the pipeline is provided with a first branch pipe and a second branch pipe, the first branch pipe is communicated to the outside, and the second branch pipe is communicated to the inside. The refrigerant gas pipeline of the air conditioning system is used as a fresh air pipeline, so that the problem that pipe holes are additionally formed in a wall body of a fresh air conditioner is solved.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a one-way filter according to an embodiment of the present application;
fig. 3 is a control flowchart of an air conditioning system according to an embodiment of the present application.
The reference numerals are represented as:
1. a first branch pipe; 11. a first control valve; 12. a four-way valve; 13. an air pump; 14. a one-way adsorber; 15. a one-way filter; 2. a second branch pipe; 21. a third control valve; 22. a fresh air guide vane; 3. a pipe section; 31. a fourth control valve; 32. a second control valve; 33. an electric control pressure gauge; 34. a muffler; 4. a compressor; 5. a condenser; 51. an outer fan; 6. a throttling device; 7. a fifth control valve; 8. an evaporator; 81. an inner fan.
Detailed Description
Referring to fig. 1 to 3 in combination, according to an embodiment of the present application, a fresh air assembly includes:
a pipe connecting an indoor unit and an outdoor unit of the air conditioning system, for circulating a refrigerant;
the pipeline is provided with a first branch pipe 1 and a second branch pipe 2, the first branch pipe 1 is communicated to the outside, and the second branch pipe 2 is communicated to the inside.
This application fresh air pipeline directly adopts air conditioning system's refrigerant circulating line, or merges fresh air pipeline and refrigerant pipeline into a pipeline, need not additionally to increase the pipeline and inputs the new trend, has reduced additionally and has beaten the new trend tube hole at the wall body, reduces after sale installation cost, does not influence the interior architecture aesthetic property.
In some embodiments, the indoor unit comprises an evaporator 8 and the outdoor unit comprises a compressor 4, and the piping comprises a pipe section 3 connected between the outlet of the evaporator 8 and the inlet of the compressor 4.
Specifically, the circulation pipeline and the fresh air pipeline, which are gaseous in the refrigerant in the air conditioning system, are combined into one pipeline, so that gas replacement is conveniently carried out inside the pipeline, and two processes of single-pipe in-out of the refrigerant and fresh air are realized.
In some embodiments, a first control valve 11 is disposed on the first branch pipe 1, a second control valve 32 is disposed between the pipe section 3 and the inlet of the compressor 4, a third control valve 21 is disposed on the second branch pipe 2, and a fourth control valve 31 is disposed between the pipe section 3 and the outlet of the evaporator 8.
Control valves are arranged at the positions of corresponding branch pipes, inlets of the compressors 4, outlets of the evaporators 8 and the like to regulate and control the on-off in different using processes, so that the pipe sections 3 can be applied in different states.
In some embodiments, the fresh air module further comprises a reversing module, and the reversing module is arranged on the first branch pipe 1 and is used for changing the direction of the airflow in the first branch pipe 1.
Set up the switching-over subassembly on first branch pipe 1, conveniently regulate and control 3 new trend flow directions of pipeline section, if to indoor input new trend, or with the new trend evacuation in the pipeline section 3 be convenient for refrigerant circulation etc..
In some embodiments, the reversing assembly comprises an air pump 13 and a four-way valve 12, and the four-way valve 12 comprises the four-way valve 12.
Specifically, the reversing assembly is formed by combining an air pump 13 and a four-way valve 12, the flow direction is changed through the four-way valve 12, and the air pump 13 realizes pressurization air supply and vacuum pumping.
In some embodiments, a filter assembly is further disposed at the other end of the first branch pipe 1, and the filter assembly is configured to be communicated in a single direction in the flow direction of the pipe section 3.
When fresh air is input into a room, the air needs to be purified by the filtering component, and the freshness of the air entering the room is ensured.
The filter component that one-way switches on can include two parallelly connected and reverse setting's check valve to and filter the piece and constitute, filter and establish on the check valve pipeline of input new trend.
According to another aspect of the present application, there is provided an air conditioning system comprising a fresh air component as described above.
The fresh air component is arranged on an air conditioning system, so that the switching between an air conditioning operation mode and a fresh air mode can be realized, and a fresh air pipe hole is not required to be additionally arranged.
In some embodiments, the outdoor unit further comprises a throttling device 6, and a fifth control valve 7 is arranged between the throttling device 6 and the inlet of the evaporator 8.
A control valve is arranged between the throttling device 6 and the evaporator 8 to regulate and control the on-off in different using processes, so that the pipe section 3 can be applied in different states.
According to another aspect of the present application, there is provided a control method of the air conditioning system, the control method includes a fresh air mode, the fresh air mode includes a refrigerator recovery stage and a fresh air introduction stage;
the refrigerant recovery stage comprises: closing the first control valve 11, the third control valve 21 and the fifth control valve 7, opening the second control valve 32 and the fourth control valve 31, operating the compressor 4 for a preset time, and closing the second control valve 32 and the fourth control valve 31;
the fresh air introduction stage comprises: the first control valve 11 and the third control valve 21 are opened, and fresh air is supplied to the indoor space through the first branch pipe 1, the pipe section 3 and the second branch pipe 2.
In some embodiments, the control method further comprises an air conditioning mode comprising an evacuation phase and an operation phase;
the evacuation phase comprises: opening the first control valve 11, closing the second control valve 32, the third control valve 21, the fourth control valve 31 and the fifth control valve 7, exhausting the air to the outdoor from the first branch pipe 1 by the regulating and controlling reversing assembly to a preset vacuum degree, and closing the first control valve 11;
the operating phase comprises: the second control valve 32, the fourth control valve 31 and the fifth control valve 7 are opened and the compressor 4 is operated.
The air conditioning system shown in fig. 1 is mainly divided into an indoor side part, an outdoor side part and a pipeline part connecting the indoor side and the outdoor side; the indoor side comprises a fresh air guide vane 22, an evaporator 8, an inner fan 81, a third control valve 21 and a fourth control valve 31 which are arranged in the indoor machine.
The outdoor side comprises a compressor 4, a condenser 5, an external fan 51, a throttling device 6, a fifth control valve 7, an air pump 13, a four-way valve 12, a one-way air filter, a one-way air absorber, a first control valve 11, a second control valve 32, an electric control pressure gauge 33 and a silencer 34 which is arranged on a refrigerant pipeline and is arranged in the outdoor machine.
The inside of the one-way air filter is of a double-pipe structure, wherein the double-pipe structure comprises two one-way valves and a filter, and air is only conducted in one direction when passing through the one-way valves, as shown in fig. 2. The structure of the unidirectional air adsorber is consistent with that of the filter, and the filter is only required to be replaced by the adsorber, so that the description is not repeated.
The operation mode of this application air conditioning system includes:
1. when the air conditioner is in the normal operation cooling mode
The first control valve 11 and the third control valve 21 are closed, the second control valve 32, the fourth control valve 31 and the fifth control valve 7 are opened, and the refrigerant flow path is from the compressor 4 to the condenser 5 to the throttling device 6 to the evaporator 8 to the return compressor 4;
2. when the air conditioner is in the heating mode in normal operation
The first control valve 11, the third control valve 21 are closed, the second control valve 32, the fourth control valve 31 and the fifth control valve 7 are opened, and the refrigerant flow path is that the compressor 4, the evaporator 8, the throttling device 6, the condenser 5 return to the compressor 4
3. When the refrigeration mode is switched to the fresh air mode, the method is divided into the following three stages
3.1, refrigerant recovery stage: the first control valve 11, the third control valve 21 and the fifth control valve 7 are closed, the second control valve 32 and the fourth control valve 31 are opened, at this time, the compressor 4 enters a refrigerant recovery mode, the compressor 4 is controlled to operate at the frequency that the compressor 4 recovers refrigerants, meanwhile, the inner fan 81 operates at the rotational speed that the inner fan 81 recovers refrigerants, residual refrigerant liquid in the evaporator 8 is rapidly gasified, refrigerant gas in a refrigerant pipeline is recovered to a liquid storage tank of the compressor 4 and the condenser 5 under the continuous suction of the compressor 4, and the refrigerant circulation path is as follows: after the running time T1 (refrigerant recovery time) of the evaporator 8, the fourth control valve 31, the muffler 34, the second control valve 32, the compressor 4, and the condenser 5 is up, the compressor 4 and the internal fan 81 are closed, and the second control valve 32 and the fourth control valve 31 are closed;
3.2, a fresh air introduction stage: the outer machine controller controls the air pump 13 to be opened, controls the four-way valve 12cd and ab to be communicated, as shown by solid arrows in the figure, the first control valve 11 and the third control valve 21 are opened, meanwhile, the inner machine controller receives a fresh air mode, opens the fresh air flow deflector, the outdoor fresh air passes through the refrigerant pipeline to enter the indoor side, and the fresh air circulation path is as follows: the one-way air filter-one-way air adsorber-b-a-air pump 13-c-d-first control valve 11-silencer 34-third control valve 21-fresh air inlet-reach indoor. Wherein the fresh air intake is equipped with one-way air cleaner and one-way air adsorber, and it is only effective to introduce indoor one-way from the open air, and the filter plays the effect of impurity such as great dust in the filtration air, and the adsorber plays the effect of less particulate matter such as PM2.5 in the adsorption air. A silencer 34 is arranged at the position of a refrigerant pipeline before the outdoor side enters the wall body, the effect of relieving the airflow sound of the refrigerant is achieved in a refrigerating/heating mode, and the effect of eliminating the noise generated by a pipeline with a small section due to large air pressure is achieved in a fresh air mode. The indoor unit is provided with a new guide vane to play the roles of guiding and guiding.
And 3.3, closing the fresh air function, closing the air pump 13, closing the fresh air guide vanes 22, enabling the sample machine to enter a standby state, and closing all control valves.
4. When the fresh air/standby mode is switched back to the cooling/heating mode, the method is divided into the following three stages:
4.1, vacuumizing stage: after switching back to the cooling/heating mode, the first control valve 11 is opened, and the second control valve 32, the third control valve 21, the fourth control valve 31, and the fifth control valve 7 are closed. The outdoor unit controller controls the four-way valve 12 to switch over, when da and cb are communicated, as shown by the dotted arrow in fig. 1, the air pump 13 starts to operate, when the air flow path: the fourth control valve 31, the silencer 34, the first control valve 11, d, a, the air pump 13, c, b and the air pump 13 are arranged outside the room, under the continuous suction of the air pump 13, after the vacuum degree in the pipeline between the second control valve 32 and the fourth control valve 31 is less than or equal to the preset vacuum degree, after the condition that no residual air exists in the pipeline is ensured, the electric control pressure gauge 33 transmits a signal to the external machine controller, the first control valve 11 is closed, and the air pump 13 is closed.
4.2, a cooling/heating mode starting stage: the second control valve 32, the fourth control valve 31, and the fifth control valve 7 are opened, and the compressor 4 starts to operate, and enters the normal cooling mode.
4.3, cooling/heating mode closing stage: the prototype enters a standby state, and all control valves are closed
5. The refrigerant can not be recovered in the heating mode, so that when the fresh air mode is switched in the heating mode, the system can be switched to the fresh air mode only after the refrigerant is recovered in the cooling mode.
It is easily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (6)
1. A fresh air assembly, comprising:
the pipeline is connected with an indoor unit and an outdoor unit of the air conditioning system and is used for circulating the refrigerant and fresh air;
the pipeline is provided with a first branch pipe (1) and a second branch pipe (2), the first branch pipe (1) is communicated to the outside, and the second branch pipe (2) is communicated to the inside;
the indoor unit comprising an evaporator (8), the outdoor unit comprising a compressor (4), the piping comprising a pipe section (3) connected between the outlet of the evaporator (8) and the inlet of the compressor (4);
a first control valve (11) is arranged on the first branch pipe (1), a second control valve (32) is arranged between the pipe section (3) and the inlet of the compressor (4), a third control valve (21) is arranged on the second branch pipe (2), and a fourth control valve (31) is arranged between the pipe section (3) and the outlet of the evaporator (8);
the first branch pipe (1) is also provided with an air pump (13) and a reversing assembly; the reversing assembly comprises a four-way valve (12).
2. The fresh air component according to claim 1, wherein a filter component is further arranged at the other end of the first branch pipe (1), and the filter component is set to be communicated in a one-way mode in the flowing direction of the pipe section (3).
3. An air conditioning system comprising a fresh air module as claimed in any of claims 1 to 2.
4. Air conditioning system according to claim 3, characterized in that the outdoor unit further comprises a throttling device (6), and a fifth control valve (7) is arranged between the throttling device (6) and the inlet of the evaporator (8).
5. A control method of the air conditioning system according to claim 4, wherein the control method comprises a fresh air mode, the fresh air mode comprises a refrigerator recovery stage and a fresh air introduction stage;
the refrigerant recovery stage comprises: closing the first control valve (11), the third control valve (21) and the fifth control valve (7), opening the second control valve (32) and the fourth control valve (31), operating the compressor (4) for a preset time, and closing the second control valve (32) and the fourth control valve (31);
the fresh air introduction stage comprises: and opening the first control valve (11) and the third control valve (21), and blowing the fresh air into the room through the first branch pipe (1), the pipe section (3) and the second branch pipe (2).
6. The control method according to claim 5, characterized in that the control method further comprises an air-conditioning mode, the air-conditioning mode comprising a vacuuming phase and an operating phase;
the evacuation phase comprises: opening a first control valve (11), closing a second control valve (32), a third control valve (21), a fourth control valve (31) and a fifth control valve (7), exhausting air to the outdoor from a first branch pipe (1) to a preset vacuum degree by a regulation and control reversing assembly, and closing the first control valve (11);
the operating phase comprises: the second control valve (32), the fourth control valve (31) and the fifth control valve (7) are opened, and the compressor (4) is operated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011548168.8A CN112781104B (en) | 2020-12-24 | 2020-12-24 | Fresh air assembly, air conditioning system and control method of air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011548168.8A CN112781104B (en) | 2020-12-24 | 2020-12-24 | Fresh air assembly, air conditioning system and control method of air conditioning system |
Publications (2)
| Publication Number | Publication Date |
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| CN112781104A CN112781104A (en) | 2021-05-11 |
| CN112781104B true CN112781104B (en) | 2022-04-22 |
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Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000329262A (en) * | 1999-05-18 | 2000-11-30 | Inoac Corp | Piping cover member for air-conditioning unit |
| JP3822386B2 (en) * | 1999-06-17 | 2006-09-20 | 松下電器産業株式会社 | Indoor unit in air conditioner |
| CN2391126Y (en) * | 1999-10-29 | 2000-08-09 | 珠海格力电器股份有限公司 | Separating air conditioner with bidirectional air interchange function |
| JP2001324173A (en) * | 2000-05-15 | 2001-11-22 | Mitsubishi Heavy Ind Ltd | Piping structure for separate type air conditioner |
| JP2005016663A (en) * | 2003-06-27 | 2005-01-20 | Matsushita Electric Ind Co Ltd | Sleeve for refrigerant piping hole in separate type air-conditioner |
| KR20080042608A (en) * | 2006-11-10 | 2008-05-15 | 삼성전자주식회사 | Air-conditioner having ventilation system |
| CN207123002U (en) * | 2017-08-09 | 2018-03-20 | 北京晶海科技有限公司 | A kind of air conditioner connecting pipe |
| CN108518758A (en) * | 2018-05-30 | 2018-09-11 | 广东美的制冷设备有限公司 | The communicating pipe of air conditioner and air conditioner |
| CN208936267U (en) * | 2018-09-13 | 2019-06-04 | 广东美的制冷设备有限公司 | Air conditioner indoor unit and air conditioner |
| CN109668220B (en) * | 2019-01-31 | 2024-01-23 | 广东美的制冷设备有限公司 | Wall pipe and air conditioner |
| CN209672553U (en) * | 2019-04-02 | 2019-11-22 | 珠海格力电器股份有限公司 | Fresh air tube assembly and air conditioner |
| CN111780385A (en) * | 2019-04-03 | 2020-10-16 | 张翕 | Pipeline crossing interface method |
| CN212005953U (en) * | 2020-04-17 | 2020-11-24 | 广东美的制冷设备有限公司 | Wall-passing pipe, fresh air module and air conditioner |
| CN112539474B (en) * | 2020-11-24 | 2022-01-21 | 青岛海尔空调器有限总公司 | Fresh air conditioning system and control method thereof |
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2020
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